Qt 编程点滴7

class MyClass: public QWidget
{
public:
MyClass(QWidget*);
private:
QPainterPath* route;
void paintEvent(QPaintEvent*e);
};
MyClass::MyClass()
{
route = new QPainterPath();
}
void MyClass::paintEvent( QPaintEvent*e)
{
QPainter *painter = new QPainter(this);
//画校正图形
int insideR = 30;
int outsideR = 50;
QColor insideColor(237,29,12); //内圆线条颜色
QColor outSideColor(237,29,12); //外圆线条颜色
QColor lineColor(237,29,12); //直线颜色
QColor insideBrushColor(255,0,0,25);//内圆画刷颜色,最后的参数代表透明度( 0(完全透明)-100(不透明) )
QColor outsideBrushColor(255,0,0,50);//外圆画刷颜色,最后的参数代表透明度( 0(完全透明)-100(不透明) )

//QPainterPath path;
route->moveTo(insideR,0);
route->lineTo(outsideR,0);
route->arcTo(0-outsideR,0-outsideR,outsideR*2,outsideR*2,0,180);
route->lineTo(0-insideR,0);
route->arcTo(0-insideR,0-insideR,insideR*2,insideR*2,0,180);
route->moveTo(0-insideR,0);
route->lineTo(0-outsideR,0);
route->arcTo(0-outsideR,0-outsideR,outsideR*2,outsideR*2,180,180);
route->lineTo(insideR,0);
route->arcTo(0-insideR,0-insideR,insideR*2,insideR*2,180,180);
painter->setPen(Qt::NoPen);
painter->setBrush(outsideBrushColor);
painter->drawPath(*route);

painter->setBrush(Qt::NoBrush);
painter->setPen(outSideColor);
painter->drawEllipse( QPointF(0,0),outsideR,outsideR );
painter->setBrush(insideBrushColor);
painter->setPen(insideColor);
painter->drawEllipse( QPointF(0,0),insideR,insideR );
painter->setPen(lineColor);
QPoint p1(0,  0- outsideR - 10  );
QPoint p2(0,  outsideR + 10  );
painter->drawLine(p1,p2);
painter->rotate(90);
painter->drawLine(p1,p2);
painter->rotate(-90);
delete painter;
}

void MyClass::paintEvent( QPaintEvent*e)
{
QPainter *painter = new QPainter(this);
//画校正图形
int insideR = 30;
int outsideR = 50;
QColor insideColor(237,29,12); //内圆线条颜色
QColor outSideColor(237,29,12); //外圆线条颜色
QColor lineColor(237,29,12); //直线颜色
QColor insideBrushColor(255,0,0,25);//内圆画刷颜色,最后的参数代表透明度( 0(完全透明)-100(不透明) )
QColor outsideBrushColor(255,0,0,50);//外圆画刷颜色,最后的参数代表透明度( 0(完全透明)-100(不透明) )
QPainterPath path;
path.moveTo(insideR,0);
path.lineTo(outsideR,0);
path.arcTo(0-outsideR,0-outsideR,outsideR*2,outsideR*2,0,180);
path.lineTo(0-insideR,0);
path.arcTo(0-insideR,0-insideR,insideR*2,insideR*2,0,180);
path.moveTo(0-insideR,0);
path.lineTo(0-outsideR,0);
path.arcTo(0-outsideR,0-outsideR,outsideR*2,outsideR*2,180,180);
path.lineTo(insideR,0);
path.arcTo(0-insideR,0-insideR,insideR*2,insideR*2,180,180);
painter->setPen(Qt::NoPen);
painter->setBrush(outsideBrushColor);
painter->drawPath(path);
painter->setBrush(Qt::NoBrush);
painter->setPen(outSideColor);
painter->drawEllipse( QPointF(0,0),outsideR,outsideR );
painter->setBrush(insideBrushColor);
painter->setPen(insideColor);
painter->drawEllipse( QPointF(0,0),insideR,insideR );
painter->setPen(lineColor);
QPoint p1(0,  0- outsideR - 10  );
QPoint p2(0,  outsideR + 10  );
painter->drawLine(p1,p2);
painter->rotate(90);
painter->drawLine(p1,p2);
painter->rotate(-90);
delete painter;
}